ExecuteReader v/s CreateDataReader
• ExecuteReader reads the data in Connected mode, while DataReader does it in disconnected mode
• The DataTableReader obtains the contents of one or more DataTable objects in the form of one or more read-only, forward-only result sets
• DataTableReader provides a way to iterate over rows in a DataTable or in rows in cache
• The cached data can be modified while the DataTableReader is active
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